CN103712146B - Vehicle Lamps - Google Patents

Abstract

A vehicular lighting device that achieves reduction in thickness of the vehicular lighting device including a toric lens. Equipped with a toric lens (30) extending in an arc shape surrounding the light source (20) from the front side, thereby, on the one hand, it is possible to keep the emitted light from the light source (20) in the horizontal plane where the toroidal lens (30) extends The diffused light is emitted from the toric lens (30) as it is, and on the other hand, it is emitted from the toroidal lens (30) as parallel light in the vertical plane, forming a light distribution pattern that expands in a band shape in the horizontal direction. At this time, the toric lens (30) is formed such that the front face (30Aa) of the central portion (30A) in the arc-shaped extending direction is opposed to the front face (30Ba) of the general portion (30B) located on both sides thereof. The virtual extension surface (C1) is displaced rearward. Thereby, on the basis of maintaining the optical function of the toroidal lens (30), its depth dimension can be reduced, and the thickness reduction of the lamp can be achieved.

Description

Vehicle Lamps

technical field

The present invention relates to a vehicle lamp having a toric lens.

Background technique

Conventionally, as a structure of a vehicle lamp, for example, as described in "Patent Document 1", a structure in which an arcuately extending toric lens is arranged to surround a light source from the front side is known.

In this vehicular lamp, on the one hand, the emitted light from the light source is emitted from the toroidal lens as diffused light in the first plane on which the toric lens extends; The light in the two planes is emitted from the toric lens as parallel light.

Patent Document 1: Japanese Patent Laid-Open No. 63-66801

Such a vehicular lamp can easily form a light distribution pattern diffused in a band shape by utilizing the light emitted from the toric lens.

However, since the toroidal lens is arranged so as to extend in an arc shape on the front side of the light source, its depth dimension becomes somewhat large, and thus there is a problem that the lamp cannot be made thinner.

Contents of the invention

The present invention was developed in view of such circumstances, and an object of the present invention is to provide a vehicular lamp that can reduce the thickness of the lamp in a vehicular lamp including a toric lens.

The present invention achieves the above object by studying the structure of a toric lens.

That is, the vehicle lamp of the present invention has:

A light source and a toric lens extending arcuately along the first plane to surround the light source from the front side, wherein,

In the toric lens, the front face of the central portion in the arc-shaped extending direction is formed to be displaced rearward with respect to the imaginary extension faces of the front faces of the general portions located on both sides of the central portion.

The type of the "light source" is not particularly limited, and for example, a light emitting diode or the like can be used.

The “toricular lens” extends in an arc shape along the first plane to surround the light source from the front side, and the direction of the “first plane” is not particularly limited at this time.

The above-mentioned "imaginary extended surface of the front surface of the general part" means an imaginary curved surface formed by extending the front surface of the general part in the arc-shaped extending direction.

As shown in the above-mentioned structure, since the vehicle lamp of the present invention includes the toroidal lens extending in an arc shape surrounding the light source from the front side, it is possible to make the emitted light from the light source fall within the first plane in which the toroidal lens extends. The diffused light is output from the toric lens as it is, and on the other hand, it is output from the toric lens as parallel light in the second plane perpendicular to the first plane, thereby forming a light distribution pattern that expands in a band shape. .

At this time, since the toric lens is formed such that the front of the central part in the arc-shaped extending direction is displaced rearward with respect to the imaginary extension surface of the front of the general part located on both sides, the optical function of the toric lens is maintained. Fundamentally, it is possible to reduce the depth dimension thereof, thereby achieving thinning of the lamp.

According to the present invention, in a vehicle lamp including a toric lens, it is possible to reduce the thickness of the lamp.

In the above structure, as long as the curvature of the curve constituting the cross-sectional shape along the second plane orthogonal to the first plane in front of the central part of the toric lens is set to be larger than that in the front of the general part of the toroid lens along the second plane When the curve curvature of the cross-sectional shape is large, the following effects can be obtained.

That is, if only the front of the central portion is displaced rearward with respect to the imaginary extended surface of the front of the general portion, and the light emitted from the general portion is set to become parallel light in the second plane, the emitted light from the central portion is The light in the second plane becomes slightly diffused. On the other hand, as long as the curvature of the curve constituting the cross-sectional shape along the second plane is set to a larger value at the front of the central portion than at the front of the normal portion, even light emitted from the central portion will not be visible in the second plane. Can become parallel light.

Here, the "second plane" correctly means a plane that includes the axis of rotation of the toroidal lens extending in an arcuate shape among the planes perpendicular to the first plane.

In the above structure, as long as the cross-sectional shape of the back of the central portion along the second plane is formed into a convex curve, compared with the case where the cross-sectional shape is formed into a straight line, even if the curvature of the front of the central portion is small, The outgoing light becomes parallel light in the second plane. And only by reducing the curvature of the front surface of the central portion in this way, the depth dimension of the toric lens can be further reduced.

In the above structure, a light guide plate is disposed on the front side of the toric lens so as to extend along the first plane, and the light guide plate injects light from the light source emitted from the toric lens from the rear and emits it from the front. On this basis, the back of the light guide plate has: a first incident part, which refracts the exit light from the toroidal lens to the front side; The side refracts the outgoing light from the toroidal lens to the side; the reflection part internally reflects the outgoing light from the toric lens that enters from the second incident part toward the front, as long as it is such a structure , high-precision light distribution control can be performed on the emitted light from the light source.

In this case, only because the depth dimension of the toric lens can be reduced, the toric lens can be arranged close to the first incident portion of the light guide plate, so the position of the light source can be shifted forward only for this purpose. Thereby, more light emitted from the toric lens can be made to enter the light guide plate, and the light utilization efficiency of the light emitted from the light source can be improved.

As a lens extending in an arc shape surrounding the light source from the front side, instead of a toric lens, the cross-sectional shape along the first plane is formed into a concave meniscus lens, and the cross-sectional shape along the second plane orthogonal to the first plane is changed to The shape is a convex lens, and when such a lens is used, the following effects can be obtained.

That is, by forming the cross-sectional shape along the first plane into the shape of a concave meniscus lens, the light emitted from the light source can be emitted from the lens as diffused light with large diffusion in the first plane than in the case of a toric lens. The cross-sectional shape along the second plane is formed into a convex lens shape, and the light emitted from the light source can be emitted from the lens as parallel light or diffused light close to it in the second plane. Thus, a longer strip-shaped extended light distribution pattern can be formed in the direction along the first plane.

In this case, since the cross-sectional shape of the lens along the first plane is formed into a concave meniscus lens shape, the depth dimension can be reduced, and thus the thickness of the lamp can be reduced.

Description of drawings

1 is a top sectional view showing a vehicle lamp according to a first embodiment of the present invention;

Fig. 2 is a sectional view of line II-II of Fig. 1;

Fig. 3 is a perspective view showing a single toroidal lens of the vehicle lamp;

Fig. 4(a) is a view showing a part of Fig. 2 taken out to illustrate the effect of the above-mentioned embodiment, and (b) is a view similar to (a) showing the structure and function of the first modification of the above-mentioned embodiment;

5 is a top sectional view showing a vehicle lamp according to a second modified example of the above-mentioned embodiment;

Fig. 6 is a sectional view of line VI-VI of Fig. 5;

Fig. 7 is a top sectional view showing main parts of a vehicle lamp according to a second embodiment of the present invention;

Fig. 8 is a sectional view taken along line VIII-VIII of Fig. 7 .

detailed description

Hereinafter, embodiments of the present invention will be described using the drawings.

First, a first embodiment of the present invention will be described.

FIG. 1 is a top sectional view showing a vehicle lamp 10 according to the present embodiment. Fig. 2 is a sectional view taken along line II-II of Fig. 1 .

As shown in these figures, the vehicular lamp 10 of this embodiment is a tail lamp installed at the rear end of the vehicle, and in a lamp chamber formed by a lamp body 12 and a transparent translucent cover 14 mounted on the opening at the front end of the lamp body 12, A light source 20 and a toric lens 30 are assembled.

As the vehicle lighting device 10 , in FIG. 1 , the direction indicated by X is "front" ("rear" as a vehicle), and the direction indicated by Y is "right direction" perpendicular to the "front".

The light source 20 is a red light emitting diode, and is arranged with its light emitting surface facing forward. The light source 20 is supported by a light source supporting member 22 supported by the lamp body 12 .

The toric lens 30 is arranged on the axis Ax extending in the front-back direction passing through the light emission center O of the light source 20 . At this time, the toric lens 30 extends in an arcuate shape centered on a vertical line (a vertical line L shown in FIG. 3 ) perpendicular to the axis Ax at the emission center O. In this toroidal lens 30, both end faces 30c in the arc-shaped extending direction are located at positions rotated 90 degrees from the position of the axis Ax to the left and right sides, and the pair of left and right end faces 30c are supported via a pair of left and right lenses. The member 32 is supported by the light source supporting member 22 .

The translucent cover 14 is formed so as to curve and extend toward the left and right sides from the position of the axis line Ax in a planar view. At this time, the translucent cover 14 is disposed so as to pass near the front of the toric lens 30 .

FIG. 3 is a perspective view showing a single toric lens 30 .

As also shown in the figure, the toric lens 30 is a transparent synthetic resin molded product made of acrylic resin or the like, and includes a central portion (that is, a central portion in the left-right direction) 30A in the arc-shaped extending direction thereof, and a central portion located in the central portion. General section 30B on the left and right sides of section 30A.

In this case, the general part 30B has its front face 30Ba formed of a torus centered on the vertical line L, and its rear face 30Bb formed of a cylindrical surface centered on the vertical line L. However, as will be described later, since the emitted light from the light source 20 is emitted as parallel light toward the horizontal direction in the vertical plane, the cross-sectional shape including the vertical line L constituting the toroidal surface 30Ba on the front side of the general portion 30B is not correct. Instead of an arc shape, it is set to a convex curve shape that approximates it.

On the other hand, the front surface 30Aa of the central portion 30A is also formed of a torus centered on the vertical line L, but is formed displaced to the rear side (more precisely, toward the vertical line L side) with respect to the front surface 30Ba of the general portion 30B. At this time, the front surface 30Aa of the central portion 30A has a vertical cross-sectional shape in which the front surface 30Ba of the normal portion 30B is moved in parallel to the vertical line L. As shown in FIG. The rear surface 30Ab of the central portion 30A has a cross-sectional shape along the vertical plane including the vertical line L, which is formed in a convex curve shape toward the rear side (more precisely, toward the vertical line L side) of the rear surface 30Bb of the general portion 30B.

The general portion 30B emits the light emitted from the light source 20 from the front face 30Ba as diffused light in the horizontal plane, and emits it from the front face 30Ba as parallel light directed horizontally in the vertical plane.

The central portion 30A also emits the emitted light from the light source 20 from the front surface 30Aa as diffused light in the horizontal plane, and emits it from the front surface 30Aa as parallel light directed horizontally in the vertical plane.

In Fig. 1 and Fig. 2, the curves (or straight lines) C1 and C2 represented by double-dotted dashed lines are the directions in which the general part 30B extends in an arc shape of the toroidal lens 30 (that is, the circle centered on the vertical line L). direction) is extended to the position of the central portion 30A, which is the imaginary extended surface of the front 30Ba and the rear 30Bb.

FIG. 4( a ) is a diagram showing a part of FIG. 2 taken out in order to explain the optical path in the vertical plane of the central portion 30A.

In Fig. 4(a), the optical path indicated by the two-dot chain line is the case where the vertical cross-sectional shape of the central portion 30A is the same as the vertical cross-sectional shape of the general portion 30B (that is, the shape indicated by the two-dot chain line in the figure). down the light path. In this case, the emitted light from the central portion 30A is parallel light directed in the horizontal direction.

In Fig. 4(a), the optical path indicated by the dotted line is the case where the front 30Aa of the central part 30A is shifted in parallel to the rear side only by a dimension a relative to the imaginary extended plane C1, while the back 30Ab of the central part 30A is the case where the virtual extended plane C2 remains unchanged. down the light path. In this case, the emitted light from the central portion 30A is slightly diffused upward and downward.

In FIG. 4( a ), the optical path indicated by the solid line is such that the front 30Aa of the central part 30A is moved in parallel to the rear side only by a dimension a with respect to the imaginary extended surface C1, and the vertical cross-sectional shape of the rear 30Ab of the central part 30A is formed to be opposite. The optical path in the case of a convex curve shape in which the extended surface C2 is convex toward the rear (that is, the case of the configuration of the present embodiment) is assumed. In this case, the emitted light from the central portion 30A is parallel light directed in the horizontal direction. Actually, in order to obtain this parallel light, the curvature of the curve constituting the vertical cross-sectional shape of the rear surface 30Ab of the central portion 30A is set.

Next, the function and effect of this embodiment will be described.

Since the vehicular lamp 10 of this embodiment includes the toric lens 30 extending in an arcuate shape surrounding the light source 20 from the front side, it is possible to make the emitted light from the light source 20 within the horizontal plane where the toroidal lens 30 extends ( That is, within the first plane) as diffused light is emitted from the toric lens 30 as it is, and on the other hand, within the vertical plane (that is, within the second plane orthogonal to the first plane) is emitted from the toric lens 30 as parallel light. The lens 30 emits light, thereby forming a light distribution pattern that spreads in a band shape in the horizontal direction.

At this time, since the toroidal lens 30 is formed such that the central portion 30A front 30Aa in the arc-shaped extending direction is displaced rearward with respect to the virtual extension plane C1 of the general portion 30B front 30Bb located on both sides thereof, the toroidal lens 30 is maintained. Based on the optical function of the toric lens 30, its depth dimension can be reduced. And thus, it is possible to reduce the thickness of the lamp without interfering with the toric lens 30 and the translucent cover 14 .

According to this embodiment, in the vehicular lamp 10 including the toric lens 30 , it is possible to reduce the thickness of the lamp.

In this embodiment, since the vertical cross-sectional shape of the rear surface 30Ab of the central portion 30A of the toric lens 30 is formed into a convex curve, the following effects can be obtained.

That is, when only the front face 30Aa of the central portion 30A is displaced rearward with respect to the front face 30Ba of the general portion 30B, and the emitted light from the general portion 30B becomes parallel light in the vertical plane, the light emitted from the central portion 30A The emitted light becomes slightly expanded light in the vertical plane. On the other hand, if the vertical cross-sectional shape of the rear face 30Ab of the central portion 30A is formed into a convex curve as in the present embodiment, then even if the curvature of the front face 30Aa of the central portion 30A is smaller than when the vertical cross-sectional shape is formed into a straight line, It is also possible to make the emitted light from the central portion 30A parallel in the vertical plane. And only by reducing the curvature of the front surface 30Aa of the central portion 30A in this way, the depth dimension of the toric lens 30 can be further reduced.

In the above-mentioned embodiment, the angular range in which the toric lens 30 forms the central portion 30A is not particularly limited, and can be formed in an angular range of about 45° to 90° with respect to the vertical line L, for example.

In the above-mentioned embodiment, the case where the cross-sectional shape including the vertical line L of the front surface 30Ba of the general portion 30B and the front surface 30Aa of the central portion 30A is set to a convex curve shape approximate to an arc shape is described, but of course they can also be Set to arc shape.

The above-mentioned embodiment has described the case where the vehicle lamp 10 is a tail light installed at the rear end of the vehicle. However, regardless of the location and function of the vehicle, the same structure as the above-mentioned embodiment can be obtained. Effect. For example, as the lamp 10 for a vehicle, other than a tail lamp, for example, a brake lamp, a daytime running lamp, a side lamp, etc. can also be used. In this case, white and dark brown light emitting diodes may be used in addition to red light emitting diodes in order to match the functions of these respective lamps.

Modifications of the above-described embodiment will be described below.

First, a first modification of the above-described embodiment will be described.

FIG. 4( b ) is a diagram similar to FIG. 4( a ) showing the structure and operation of this modified example.

As shown in FIG. 4( b ), the basic structure of this modified example is the same as that of the above-mentioned embodiment, but the structure of the central portion 130A of the toric lens 130 is different from that of the above-mentioned embodiment.

That is, the central portion 130A of the toric lens 130 of this modified example is set so that the curvature of the curve constituting the vertical cross-sectional shape of the front surface 130Aa is greater than that of the virtual extended surface indicated by the two-dot chain line in FIG. 4( b ). C1 is a value with a large curvature of the curve of the vertical cross-sectional shape.

Specifically, the front 130Aa of the central portion 130A is displaced rearward by a dimension from the virtual extended surface C1 at its upper and lower edges, and its position on the optical axis Ax is displaced rearward by b from the virtual extended surface C1. (b<a) dimension. On the other hand, the rear surface 130Ab of the central portion 130A is the virtual extension surface C2 which does not change.

Even in the case of adopting this modified example, as in the optical path indicated by the solid line in FIG. 4( b ), it is possible to make the emitted light from the central portion 130A parallel to the horizontal direction.

This modification is like the toric lens 30 of the above-mentioned embodiment, but when it is difficult to secure a space between the toric lens 30 and the light source 20 for setting the vertical cross-sectional shape of the rear surface 30Ab of the central portion 30A into a convex curve shape etc., it is particularly effective to adopt this structure.

Next, a second modified example of the above-described embodiment will be described.

FIG. 5 is a plan cross-sectional view showing a vehicle lamp 210 according to this modified example. Fig. 6 is a sectional view taken along line VI-VI of Fig. 5 .

As shown in these figures, in this modified example, three sets of the light source 20 and the toric lens 30 of the above-mentioned embodiment are assembled in a lamp chamber formed by a lamp body 212 and a transparent translucent cover 214 attached to the front opening. In addition, in this modified example, a light guide plate 240 is disposed on the front side of the three sets of toric lenses 30 in the lamp chamber.

The translucent cover 214 is formed to wrap around toward the rear side from the left end toward the right end.

Three sets of light sources 20 and toroidal lenses 30 are arranged near the rear of the light guide plate 240 . At this time, the three groups of light sources 20 and the toric lens 30 are arranged at equal intervals in the left and right directions on the same horizontal plane, and are arranged so as to be displaced rearward as they are located on the right side.

The light guide plate 240 is a transparent synthetic resin molded product made of acrylic resin or the like, and is arranged to extend along a horizontal plane. And this light guide plate 240 injects the light from the light source 20 emitted from each toric lens 30 from the back surface 240b, and emits from the front surface 240a. Flange portions 240 c are formed at both left and right end portions of the light guide plate 240 , and the pair of left and right flange portions 240 c are supported by the lamp body 212 .

The front surface 240 a of the light guide plate 240 is formed to wrap around toward the rear side from the left end toward the right end along the translucent cover 214 . In this case, the front surface 240a is configured as a light diffusing surface that diffuses the outgoing light from each toric lens 30 entering from the rear surface 240b and reaching the front surface 240a in vertical and horizontal directions. Specifically, a plurality of fish-eye lens-shaped diffusion lens elements 240s are formed in two stages above and below the front surface 240a.

On the other hand, on the rear surface 240 b of the light guide plate 240 , light control portions 240A for controlling light emitted from the respective light sources 20 are formed adjacent to three places in the left-right direction. At this time, the three light control units 240A are disposed so as to be displaced rearward as they are located on the right side.

These three light control parts 240A all have the same structure.

That is, each of these light control parts 240A has: a first incident part 240A1 that refracts light from the light source 20 to the front side in a horizontal plane; Both sides of an incident portion 240A1 refract the light from the light source 20 to the side; the left and right pair of reflective portions 240A3 direct the light from the light source 20 incident from the second incident portion 240A2 toward the front. And internal reflection by total reflection,

At this time, the first incident portion 240A1 is formed in a region spanning the axis Ax left and right. The pair of left and right second injection parts 240A2 is constituted by a vertical surface extending slightly in the left and right from the left and right end edges of the first injection part 240A1 toward the rear. A pair of left and right reflective portions 240A3 are formed so as to spread forward and leftward from the rear end edge of each second incident portion 240A2 .

The first incident portion 240A1 is formed to form an angle range substantially the same as that of the central portion 30A of the toric lens 30 with respect to the vertical line L (see FIG. 3 ). And thus, the emitted light from the toroidal lens 30 is prevented from entering the connecting portion between the first incident portion 240A1 and each second incident portion 240A2, thereby preventing the occurrence of stray light.

Since the light guide plate 240 of this modified example is provided, it is possible to perform high-precision light distribution control on the emitted light from the light source 20 .

In this case, only because the depth of the toric lens 30 can be reduced, the toric lens 30 can be arranged close to the first incident portion 240A1, and the position of the light source 20 can also be displaced forward by the reduction in depth. As a result, more light emitted from the toric lens 30 can be incident on the light guide plate 240 , and the light utilization efficiency of the light emitted from the light source 20 can be improved.

Next, a second embodiment of the present invention will be described.

FIG. 7 is a top sectional view showing the main parts of a vehicle lamp 310 according to this embodiment. Fig. 8 is a sectional view taken along line VIII-VIII of Fig. 7 .

As shown in these figures, the basic structure of this embodiment is the same as that of the second modification of the above-mentioned embodiment, and the point of disposing the lens 330 instead of the toric lens 30 of the second modification is the same as that of the second modification. The case of the second modification example is different, and the shape of the rear surface 340b of the light guide plate 340 is somewhat different from the case of the above-mentioned second modification example.

That is, the lens 330 of this embodiment is arranged to extend in an arc shape centered on a vertical line passing through the light emission center O of the light source 20, and is supported by the light source through a pair of left and right lens support members 32 on its pair of left and right end faces 330c. supported by the supporting member 22.

The lens 330 is a transparent synthetic resin molded product made of acrylic resin or the like. The cross-sectional shape along the horizontal plane including the luminous center O is formed into a concave meniscus lens shape, and the cross-sectional shape along the vertical plane including the luminous center O is formed into a plano-convex lens shape. . At this time, the rear surface 330b of the lens 330 is formed of a cylindrical surface centered on the above-mentioned vertical line as in the case of the above-mentioned second modified example, and the front surface 330a of the lens 330 is formed of a slightly deformed shape of a torus centered on the above-mentioned vertical line. free curve composition.

Specifically, the horizontal cross-sectional shape of the front surface 330a of the lens 330 passing through the light emission center O of the light source 20 is set so that the circular arc shape concentric with the circular arc shape constituting the horizontal cross-sectional shape of the rear surface 330b moves in parallel to the rear side. arc shape. As a result, in the horizontal cross-section of the lens 330 , the thickness in the radial direction becomes larger as the opening angle from the axis Ax toward the left and right sides becomes larger. Accordingly, the lens 330 does not refract the emitted light from the light source 20 as it is in the horizontal plane, but refracts it in the direction away from the axis Ax to the left and right sides at the front surface 330a after entering from the rear surface 330b. shoot out.

The front surface 330a of the lens 330 has its vertical cross-sectional shape set in a convex curve shape. At this time, in order to make the light emitted from the light source 20 exit from the lens 330 as parallel light directed in the horizontal direction within the vertical plane, the curvature of the above-mentioned convex curve is set to vary according to the opening angle position from the axis Ax toward the left and right sides. somewhat different values.

On the other hand, the light guide plate 340 of this embodiment is also the same as the light guide plate 240 of the above-mentioned second modified example, and a first incident portion 340A1, a pair of left and right second incident portions 340A2 and a pair of left and right incident portions are formed on the rear surface 340b. The light control part 340A constituted by the reflection part 240A3.

In this case, the vertical cross-sectional shape of the light control portion 340A is the same as that of the light control portion 240A of the second modified example, but the horizontal cross-sectional shape is partially different.

That is, the horizontal cross-sectional shape of the first incident portion 340A1 is the same as that of the first incident portion 240A1 of the second modified example described above, whereby the light from the light source 20 is refracted forward and incident on the light guide plate 340 . . However, the light emitted from the light source 20 reaches the first incident part 340A1 in a state of being deflected to the left and right sides by the lens 330, so the light incident from the first incident part 340A1 to the light guide plate 340 becomes as a direction to the left and right sides. The diffused light reaches the front surface 340 a of the light guide plate 340 .

On the other hand, in each second incident portion 340A2 and each reflective portion 240A3, the light from the light source 20 incident from each second incident portion 340A2 to the light guide plate 340 is reflected on the inner surface of each reflective portion 240A3 and arrives as parallel light. Front 340a. At this time, the light emitted from the light source 20 reaches the second incident portions 340A2 in a state of being deflected to the left and right sides by the lens 330. Therefore, in this embodiment, the left and right inclination angles of the second incident portions 340A2 and the The curvature of the convex curve of the horizontal cross-sectional shape of the reflecting portion 240A3 is set to a value somewhat different from that in the case of the above-mentioned second modification.

The light guide plate 340 of this embodiment is also formed with a plurality of fish-eye lens-shaped diffusion lens elements 340s in two stages above and below the front surface 340a.

In the case of adopting the structure of this embodiment, the emitted light from the light source 20 can be emitted from the lens 330 as diffused light that is more diffused in the horizontal plane than in the case of the toric lens 30 of the second modified example, and the emitted light from the light source can be made The emitted light at 20 is emitted from the lens 330 as parallel light in the vertical plane. Thereby, it is possible to form a light distribution pattern extending in a longer strip shape in the left-right direction.

In addition, the horizontal cross-sectional shape of the lens 330 of this embodiment is formed into a concave meniscus lens shape, so the depth dimension can be reduced, thereby achieving thinning of the lamp.

Since the present embodiment also has the light guide plate 340 , it is possible to control the light distribution with high precision for the light emitted from the light source 20 .

In this case, only because the depth dimension of the lens 330 can be reduced, the lens 330 can be arranged close to the first incident portion 340A1, so the position of the light source 20 can be shifted forward only for this purpose. Thereby, more light emitted from the lens 330 can be incident on the light guide plate 340 , and the light utilization efficiency of the light emitted from the light source 20 can be improved.

Like the vehicular lamp 310 of this embodiment, when the light source 20 is composed of a light emitting diode and its light-emitting surface is arranged facing forward, when the vehicular lamp 310 is viewed from the front, the front surface 340a of the light guide plate 340 The light emission in the vicinity of the axis Ax tends to be too bright locally.

In this regard, in this embodiment, since the emitted light from the light source 20 passes through the lens 330 and reaches the first incident portion 340A1 in a state of being deflected to the left and right sides, the light entering the light guide plate 340 from the first incident portion 340A1 Since the light reaches the front surface 340a as light diffused to the left and right sides, the following problem can be prevented. The glow is locally too bright.

In the above-mentioned second embodiment, the case where the vertical cross-sectional shape of the lens 330 is a plano-convex lens is described, but the vertical cross-sectional shape can also be a biconvex lens shape or a convex meniscus lens shape.

In each of the above-described embodiments and modifications thereof, the numerical values shown as the respective elements are merely examples, and of course they may be appropriately set to different values.

The present invention is not limited to the configurations described in the above-described embodiments and modifications thereof, and configurations with various modifications other than these can be employed.

Symbol Description

10, 210, 310 lamps for vehicles 12, 212 lamp body 14, 214 translucent cover

20 light source 22 light source support member 30A, 130A central part

Front of 30Aa, 30Ba, 130Aa, 330a

Behind 30Ab, 30Bb, 130Ab, 330b

30B general part 30c, 330c both end faces 32 lens support parts

240, 340 light guide plate 240A, 340A light control part

240A1, 340A1 first injection part 240A2, 340A2 second injection part

240A3, 340A3 reflective part 240a, 340a front 240b, 340b rear

240c Flange 240s, 340s Diffusion Lens Element 330 Lens

Ax axis C1, C2 imaginary extension plane L plumb line O luminous center

Claims (4)

1. A lamp for a vehicle comprising: a light source and a toroidal lens extending arcuately along a first plane to surround the light source from the front side, characterized in that, The front face of the central portion in the arc-shaped extending direction of the toric lens is formed to be displaced rearward with respect to the imaginary extended face of the front face of the general portion located on both sides of the central portion, The curvature of the curve constituting the cross-sectional shape along the second plane orthogonal to the first plane at the front of the central portion is set to be larger than that constituting the cross-sectional shape along the second plane at the front of the general portion. The value of the curvature of the curve is large. 2. The vehicle lamp according to claim 1, wherein a cross-sectional shape of the rear of the central portion along the second plane is formed into a convex curve shape. 3. The vehicle lamp according to claim 1, wherein a light guide plate is arranged on the front side of the toroidal lens so as to extend along the first plane, and the light guide plate takes the light from the toric lens The light emitted from said light source enters from the rear and exits from the front, The rear surface of the light guide plate has: a first incident part that refracts the emitted light from the toroidal lens forward; and a second incident part on both sides of the first incident part. the light emitted from the toroidal lens is refracted laterally; 4. The vehicular lamp according to claim 2, wherein a light guide plate is arranged on the front side of the toroidal lens to extend along the first plane, and the light guide plate takes the light from the toroidal surface The light from said light source coming out of the lens enters from the back and exits from the front, The rear surface of the light guide plate has: a first incident part that refracts the emitted light from the toroidal lens forward; and a second incident part on both sides of the first incident part. the light emitted from the toroidal lens is incident sideways so as to be refracted; and the reflector internally reflects the light emitted from the toroidal lens that enters from the second incident portion toward the front.